Promote no AI value message to error, shouldn't happen without mods

AI/VCAI/FuzzyEngines.cpp

@@ -382,7 +382,7 @@ float VisitObjEngine::evaluate(Goals::VisitObj & goal)
 	else
 	{
 		MapObjectsEvaluator::getInstance().addObjectData(obj->ID, obj->subID, 0);
-		logGlobal->warn("AI met object type it doesn't know - ID: " + std::to_string(obj->ID) + ", subID: " + std::to_string(obj->subID) + " - adding to database with value " + std::to_string(objValue));
+		logGlobal->error("AI met object type it doesn't know - ID: " + std::to_string(obj->ID) + ", subID: " + std::to_string(obj->subID) + " - adding to database with value " + std::to_string(objValue));
 	}
 
 	setSharedFuzzyVariables(goal);